A recent data crunch by real-estate listings and information company Zillow showed that in the 3½ month period between Facebook filing its IPO paperwork and its shares starting to trade, the proportion of million-dollar listings in Menlo Park, Calif., where the company is headquartered, jumped 87%. (The Journal has also written about this.)

Jeff Mallett, the former chief operating officer of Yahoo Inc. whose house is featured as today’s House of the Day, knows something about the housing markets near and dear to the hearts’ of Silicon Valley employees. The property in California’s Napa Valley, which features a 7,500-square-foot home and a personal golf course, is on the market for $17.5 million.

With today’s focus on companies like Facebook and LinkedIn, it’s easy to forget that Yahoo and others created the blueprint for the dot-com success story almost 20 years ago. “In that period, we were actually very low key,” Mr. Mallett said about the sudden wealth and recognition that he and his colleagues found in the mid-‘90s.

Mr. Mallett sees an uptick in real-estate markets as a natural byproduct of thriving tech companies.

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